package chapter4.Example14;
abstract class Animal{
    abstract void shout();
}
class Cat extends Animal{
    void shout() {
        System.out.println("喵喵......");
    }
}
class Dog extends Animal{//朱佳雪
    void shout(){
        System.out.println("汪汪......");
    }
}
public class Example14 {

        public static void main(String[] args) {
            Animal an1 = new Cat();
            Animal an2 = new Dog();
            an1.shout();
            an2.shout();
        }
    }

